Question 77 What are two distinct sources of microplastic particles? What are tw

Question

Question 77

What are two distinct sources of microplastic particles? What are two types of plastic material commonly found in microplastic particles Why can microplastic particles sorb high log K_ow compounds and why is this a problem? What is a "nurdle" used for, and is it a microplastic? What is a "gyre" and how does it relate to microplastics? For microplastics, the environmental half life is generally measured in at least (circle one or two adjacent time frames) days weeks months years decades centuries milllenia

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Question 77-

Answer -

Micro plastics are small plastic particles in the environment. While there is some contention over their size, the U.S. National Oceanic & Atmospheric Administration classifies micro plastics as less than 5 mm in diameter. They can come from a variety of sources, including cosmetics, clothing, and industrial processes.

Plastic is classified into six classes -

polyethylene (PE)

polypropylene (PP)

polyvinyl chloride (PVC)

polystyrene (PS)

polyurethane (PUR) and

polyethylene terephthalate (PET).

The most plastic materials present in micro plastics are - Polyethylene (PE) – Approximate 79% & Polypropylene (PP) – Approximate 64%

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